Add 21/15 and 98/42
1st number: 1 6/15, 2nd number: 2 14/42
21/15 + 98/42 is 56/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
21/15 = 21 × 14/15 × 14 = 294/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
98/42 = 98 × 5/42 × 5 = 490/210 - Add the two like fractions:
294/210 + 490/210 = 294 + 490/210 = 784/210 - 784/210 simplified gives 56/15
- So, 21/15 + 98/42 = 56/15
In mixed form: 311/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15+98/42 21/30+98/42 21/15+98/84 63/15+98/42 21/45+98/42 21/75+98/42